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SubGravity Delayed Surface Marker Buoys or DSMBs (also known and commonly referred to SMBs / Surface Marker Buoys) increase diver safety by providing

Surface Marker Buoy (AKA SMB OR DSMB)

Surface Marker Buoy (aka SMB or DSMB) - SubGravity

The bright color of the SMB will be visible at a long distance even during unfavorable weather conditions. Equipped with high reflective tape. Easy to

Hi-Viz SMB Surface Marker Buoy for Scuba Diving